Finding the Third Proportional to 1,405,964 and 2,128,667

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405,964 : 2,128,667 = 2,128,667 : x
2. Step 2: Convert to fraction form
   1,405,964/2,128,667 = 2,128,667/x
3. Step 3: Cross multiply
   1,405,964x = 2,128,667 × 2,128,667
4. Step 4: Simplify right side
   1,405,964x = 4,531,223,196,889
5. Step 5: Solve for x
   x = 4,531,223,196,889/1,405,964
6. Step 6: Final answer
   x = 3,222,858.62